Brake mechanism.



A. LARSEN. BRAKE MECHANISM. APPLICATION rum) IU'LYB 100a Yatented 511118 29, 1909.

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1 2.23.... ..Hlki.w n: V v w 7 ..i ADP A. LARSEN. BRAKE MBUHMIIS'M. urmoumn mum JULY 8. 1908.

Patented June29, 1909.

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A. LARSEN. BRAKE MECHANISM. APPLIOATIOH FILED JULY 9 1909.

926,578. Patented. June 29,1909.

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.LO clear, and exact description of the invention,

} P brake mechanism, and is especially applicamay be used to set the brakes either wholly consists in the construction and combina D is a cross section on the me 4-4 of Fig. 1,

6 represents a beam connecting the parts UNITED OFFICE.

ANDREW LARSEN, or New IBERIA, LOUISIANA.

BRAKE MECHANISM.

No. 926,578. Specification Letters Patent. Patented June 29, 1909. Application filed July 8,l1908. Serial No. 442,578.

in Fig. 5, with one straight side and one inclined side, and adapted to fit in the groove Eachsection of the brake shoe has attached to it, or made integral with it, an eyef through which the steel brake band 7 passes ao This and is provided with projections h which fit in corres oiiding depressions in the brake shoe 0, as s own in Fig. 5. Screws 2' are used for tightly fastening the band to the sectional brake shoes. (35 For adjusting-the parts to get them in the proper relation to each other .I providethe means, shown in Figs. 1 and 4. The top bar a of the frame is adjustably connected to the rest of the frame in the following.inaiiner: .30 54 and 55 re resent inclined braces firmly attached to t e beam 6, and 56 and57 represent other inclined braces also attached to the beam' Z). The top bar a is slotted, as, shown at 58 for example, so that it may be adjusted with relation to the braces 54, 55, 56 and 57.- Bolts, such as 59, run through these slots for securing the bar ain any desired relation to the rest of the framework. Downwardly projecting from the bottom of e bar a areright-angled plates 60, and bolts 61 ass through these plates 60 and the inclined braces 54 and 55, as best shown in To all whom it may concern:

e it known that I, AN subliectof th e King of Denmark, (whohas;

E5 of the United States,) residing at New Iberia, in the parish of Iberia andState of Louisiana, ave invented certain new and useful Inn. Iprovements in Brake Mechanism; and I do} iereby declare the following to be a full,

such as will enable ot ers skilled in the art, to which it appertains to make .and use the same. Myfiinvention relates to improvements in: ble tov electric cars, although it is not confined, to such use- The object of my invention is to rovide a device whereby the momentum 0 the car;

-91: partially, said means being set in opera-; "tion on the wheels by the conductor or brakeman and released when desired. With this object in view, my invention.

'tionsiof parts. as hereinafter described andl .In the accom anying drawings-Figure If is a plan view s owing part of a truck with; Fig. 4. At each end the bar a is provided ereto. Fig. 2 is a. with means for preventing the bra 'e shoes central cross section thereof. F g. 3 is a. f i cross section of the means whereby the move consisting ofa plate 62 adjustably fastened ment of the ear axle is caused to set in o era- .to the erid of the bar a. The plate 62 is tion the means for settin the brake. i 4 slotted, as shown at 63, for the passage of bolts, such as 64, so that said plate 62 may be adjusted on the bar a toward and away from the car wheel. The top eye f is novided with a right-angled extension w icli enters a slot 65 in the late 62, thus ermitting the setting and re easing of the rakes, ut insuring that the brake shoes when released will not be disengaged from the car Wheel.

The ends of the band 9 are firmly secured in a heavy rocking bracket 7', which is mount 71700 ed on the red It secured in the parts of the truck frame. The lower end of thc brake band 9 is bent downwardly and passes through a hole in the lower. partfof the 51) an approximately triangular recess .d in the bracket 9', beingfastened by a nut 7n. The 10:, periphery .ofa side extension Within which upper end of'the band 9 passes into a sleeye the brake shoe e fits. Thisbrake shoe is it provided with pivots, o resting in correanade in curved sections forming arcs of a sponding recesses in the bracket 7', and the circle, of which the car axle is the center. upper end of the band gis screw threaded, a These shoes areeach made in the form shown} nut 12 being used to take up the slack.

looking in the direction of the arrows. Fig.

is a cross section, on an enlarged scale,; taken on the line 55 of Fig. 4. Fig. 6 is a view of a. part of a steel band used in applying the brake shoes. r a indicates the top bar of the inside portion of the truck frame, the outer part a of said; frame being of anyusual or approved con; struction.

of the frame. 0 indicates the car wheels of which there weave bearings which slide up and down freely f or a limited distance in the plates 15, in and 18, said plates being slotted for this purpose. Springs, such as 2 1, are arranged near eacn end of the shaft 22 and normally serve to keep the rollers 2-1 and 23 apart.

As shown in Fig. 1, the parts for pushing the roller 23 down into contact with the roller 21 are duplicated, one set at each end of these rollers, but they are all operated by 70 the rod '7. The links 13 bear on the rounded projections 25 on the top of the bearings of the shaft 22. It is obvious from the construction described that a movement of the link or rod 7 to the right, from the position 80 shown in Fig. 3, will pull the links 13 down. This will bring the roller 23 down upon the roller 21 and will bring the arms 11' up against the said roller 21. Thus an even pressure will be exerted both above and be- 85 low upon the roller 21 which is secured to the car axle 20.

T o. the shaft 22, in the trough formed between the plates 16 and 18 is fixed a roller 26 and to this roller is attached. one end of a 90 chain 27, a guide roller 28 being provided which is pivotally mounted in the plates 16 and 18. The other end of thechain 27 is attached to one end of a slidable rack 28, pro vided with teeth 29, which slides freely on 95 the part 19. it is obvious that the rotation of the roller 26 will wind up the chain and drag the rack 28 toward the roller 26. This roller 26 is set in motion by the motion of the roller 23, which in turn is set in motion by the roller 21 when the rollers 21 and 23 are brought into contact with each other, which occurs when the motorman or brakeman sets the brakes by pulling On. either of the rods or 6. 105

Means are provided, after the brakes have been set, to hold them set until released consisting of a pawl engaging with the teeth 2?) of the rack 2-8. This pawl consists of a bell crank lever 30 forked at its lower end and 110 having a pin 31 mounted in said forks, and on this pin is pivotally meunted a downwardly projecting tooth 32 adapted to engage with the teeth 29. A spring, such as 33, is wound around the pin 31, as best shown in Fig. 2, 315 andnormallypresses the tooth 32 down. The

awl tooth 32 carries upon it a pivoted latch 34 provided with a tooth 35 adapted to enage a corresponding depression in the part 30. The free end of the latch 34 passes be 129 ter and terminates at the other end in an entween pins 36 projecting from one arm of the larged portion 11, 18 represents a plate bell crank lever 37, the upper end of which is similar to the plate 17, and these two plates attached by the means of a pin 38 to an operare 3omed together by a bottom plate 19 ating rod 39. The rod 39 is flattened, as at 60 forming a trough, the plates 15, 16 and 18 i0, and provided with a slot 41 within being oined together by suitable bolts. which plays a pin 42 carried; on the upper end Mounted on the car axle 20 is a roller 21, of the part 30. The hther'end oilt he rod 39 preferably of metal, and above the roller 21 l is ,pivotally attached to a link 43 which is on a shaft 22 is mounted a roller 23, preferl mountedcn a pin on a support carried {1 represents a spring attached to the truck frame which normally tends to hold the brake shoes away from the wheels. The construction of the brake bands and other 5 devices is the same for each of the car wheels.

Nhen the bracket is rocked to the right, from the position. shown in Fig. 4, it will obviously tighten the band 9 and set the brakes. This rockin is accomplished by the following means: n the top of the bracket 9' is provided a perforation shown in dotted lines in Fig. 1, smallest at the center and rounded so as to reduce the friction to a minimum. In this erforation engages the rounded end of a bra e lever s a similar brake lever s being provided for the adjacent wheel. The levers s and s are connected together by a rod t so that they move in unison, this rod being pivot ally connected to thelever s. The lever s is pivotally mounted on a support a attached to or forming a part of the truck frame, and the bracket 3' has pivoted to it a link 1; which is also pivotally attached at the other end of the support a. The lever s an the corresponding lever s are operated by means of the rod w which terminates in a fork a:, in the ends of which is mounted a roller g which bears against the free ends of the levers s and s To the lever sis attached an arm 2 which is connected by a link 1 to a freely movable arm 2, which in turn is connected by a spring 3 to a truck frame, the lever 8 being similarly connected to the arm 2. The sprm 3 is adapted to disengage the brakes from the car wheels when the pressure is removed.

The brakes are set in the following manarm 4 which is connected by rods 5 and 6 shown) at either en of the car. To the arm 4 is pivotally connected a rod 7 which in turn ispivotally connected to one arm of a bell 45 crank lever 8. The other arm of this lever is connected to a link 9 which has pivoted on it another link 10 which is also pivotally conneeted to a curved arm 11. To the end of the link 9 is pivotally attached another link 12 which in turn is attached to a link 13, the other end of which is ivotally mounted on a pin 14. One end of t e pin 14 is mounted in a plate 15 which is arranged parallel to, and is of the same shape as the plate 16, shown in Fig. 2. The plate 16 is cutaway at the cenably of paper. The shaft 22 is' arranged in '3 by thetruck .fran'ze, and to thelink es, at each 131} each other, and connections between one of said rollers and the brake mechanism, substantially as described:

2. The combination of a truck with axles and car wheels mounted end thereof, are attached rods 46 and 47, one leading to each end of the car, by means of which the pawl can be (lLiG-L *aged from the rack 21 when it is desired to release the provided thereon,

5 brakes. 70

The pawl 28 has pivotally attached to one each-of said car wheels being provided with a end thereof a rod 48 which is pivotally attriangular depression, sectional brake shoes tached to one end of a link 49. To the other fitted in said depression, each of said brake end of the link 4.9 is pivotally attached a rod shoes being provided with a projecting eye,

50, the other end of said rod being connected a band passing through said eyes and secured 75 to an arm 51 which is connected at one end to the brake shoes, a rocking bracket to to the rod to and pivot-ally mounted at the which the ends of said band brakes are seother end on a support 52 carried by the cured, means carried by the truck frame for truck frame. By means of the connections preventing the disengagement of said brakes described it is obvious that the movement of from said wheels, and connections whereby so the rack 28 to the left, from the position the movement of the car axles causes thesetshown in Fig. 2, will set the brakes. To the ting of the brakes, substantially as described. center of the link 49 is pivotally attached a 3. The combination of a truck provided rod 53 which runs to similarly arranged con with axles and car wheels mounted thereon,

2o ncctions on the other truck, if two trucks are each of said car wheels being provided with a 85 used on a car. triangular depression, sectional brake shoes The operation is as follows z-W'hen the fitted in said depression, each of said brake conductor or brakeman desires to set the shoes being provided with a projecting eye brakes, by means (not'shown) a pull is put a and passing through said eyes and secured upon either'the rod 5 or the rod 6. This to the brake shoes, a rocking bracket to 90 brings the roller 23 into contact with the which the ends of said band brakes are seroller 21, and as the latter is fixed to the car cured, means carried by the truck frame for axle the rotation of said axle causes the roreventing the disengagement of said brakes tation of the roller 23, which in turn rotates ii'om said wheels, connections whei'eby the the roller 26, winding up the chain 27 and movement of the car axles causes the setting 95 drawing the rack 28 toward the roller 26, f the brakes, and devices operated by the said rack being locked by the tooth 32 until brakeman for causin the operation of said the brake is released. The faster the car is connections, substantially as described. moving the greater is the pull exerted upon 4. The combination of a car truck prothe rack and the more rapidly the brake will vided with axles and wheels, each of said 100 be set, unless the conductor or motorman wheels having a triangular de ression, secstops operating the brake, in which case the tional brake shoes adapted to iit in said debrake will remain as set until released. By pression, each brake shoe being provided this means an emergency braking action can with a projecting eye, a band assing 40 be exerted, or a partial braking action if it is throughsaid eyes screws to secure said band 105 desired to slow down instead of stopping. to said shoes, a rocking bracket to which the The brake remains set until it is released in ends of said band are secured, means for adthe following 1nannerz-A pull is exerted by justing said band to take up the slack, and the conductor or brakeman on either one of means operable from the movement of the 4-3 the rods or 47. This moves the link 43 axle to said brakes, substantially as de- 110,, and by the connections described moves the scribed. bell crank lever 37, disengaging the catch 34 5. The combination of a car truck r0- from the part 30, whereupon afurthermovevided with axles and wheels, each of said ment of the link 43 will release the tooth 32 wheels having a triangular de ression, secfrom the rack, the pin 42 having meanwhile tional brake shoes adapted to it in said de-'l15 traveled to the end of the slot 4.1. As soon pression, each brake shoe being provided as the tooth 32 is disengaged from the rack with a projecting eye,a band passing through the spring 3 restores the parts to their said eyes, screws to secure said band to said original position. shoes, a rocking bracket to which the ends of Having thus described my invention, I said band are secured, means for adjusting claim said band to take up the slack, means operl. The combination of brake mechanism able from the movement of the axle to said and means for operating said mechanism, brakes, and a spring for normally holding said means including a roller mounted on said brake shoes disengaged from the cor- 6 the car axle, asecond roller parallel thereto, responding car wheels, substantially as desprings normally separating said rollers, scribed. devices including a curved arm adapted to 6. The combination of a car truck proe engaged with the stationary roller vided with axles and wheels mounted therewl'iereby pressure is brought upon both of on, a brake for each wheel and means for set- 6 said rollers bringing them into contact with ting said brake by the rotation of one of the 43; eeeeve car axles, including a roller mounted on said l axle, a roller normally separated fromsaid axle, a roller normally separated from said first-named roller, means for bringing sal first-named roller, means for bringing said. rollers into contact with each other, a chain 20 rollers into contact with each other, a chain wound up by the movement of said secondwound up by the movement of said secondnamed roller, a sliding toothed rack carried named roller, a sliding by said chain, a pawl for engaging saidraok, by said chain, a pawl for engaging said rack, a brake lever for the brakes on each'of said a brake lever for the brakes on each of said wheels, said brake levers being connected to- 25 gether so as to move simultaneousl and j: means for disengaging said pawl from said rack, substantially as described.

In testimony whereof, I aiiix my signature in presence of two witnesses.

ANDREW LARSEN.

wheels, said brake levers being connected together so as to move simultaneously, and connections between said rack and said lever, substantially as described.

7. The combination of a car truck provided with axles and wheels mounted thereon, a brake for each wheel and means for settingsaid brake by the rotation of one of the car axles, including a roller mounted on said tootl'led rack carried l l Witnesses:

A. J. RENOUDET, J. a. Eno'rz. 

